Improvement in subsoil-plows



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JAMES MGCOLLUM, OF BURNSVILLE, ALABAMA.

IMPROVEMENT iN SUBSOlL-PLOWS.

Specification forming part of Letters Patent No. 32,139. dated April 23, 1861.

To all whom, t may con/cern.-

Beit known that I, JAMES McCoLLUM, of Burnsville, in the county of Dallas and State of Alabama, have invented a new and Improved Subsoil-Plow; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure lis aperspectiveview ofthe improved plow complete. Fig. 2 is a side elevation of shovel or plow blade, and the colter to which it is attached, detached from the machine.

Similar letters of reference indicate corresponding parts in both figures.

This invention relates to certain improvements in adjusting the shovel of a subsoilplow and in securing the shovel and its colter to the adjustable frame for the purpose of regulating in a vsimple manner the depth which it is desired to stir the subsoil, at the same time aording asubstantial brace to the colter and shovel.

The nature of my inventions and in1proveincuts consist, first, in combining with two double-pivoted bars an adjustable brace pivoted to the lower ends of said bars, and secured at its rear end to the back bars, as will be hereinafter described, forming the adjustable plow-stock; secondly, in a novel manner of attaching and securing a curved shovelcarrying colter to the forward jointed bars of the stock, whereby said colter and shovel may be adjusted vertically, and also secured to the bars in a rm and rigid manner, as will be hereinafter described.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

A is the beam, and B B are the handles of an ordinary plow-frame, which are secured together and braced in the usual manner. At the rear end of beam A, and secured to the bottom of this beam, is an eye, a, to each side of which a curved bar, b, is pivoted by a pin, b', passing transversely through the upper ends of the bars b I; and through eye a. These twin bars b b, being of a suitablelength, are pivotedat their lower ends to the adjustble brace c, (at (1,) which is a flat, angular bar with a sector-head, c, on its rear end, having a number of perforations transversely through it, which are made in an arc described from the pivot-j oint d. This adjustable brace c is pivoted at its lower or forward end at i to lower end of and between two Afiat and curved bars, g g, which bars are pivoted at h toa fixed eye, c', at their upper ends. Eye a is in advance of eye a, and eye a is securely bolted to the bottom of beam A. The forward bars of g g are curved from pivot 71l to the pivot i, and on their front edges rackteeth j j are cut, which teeth are pitched downward, as is represented in Fig. l of the drawings. The har c is used, as it will be seen from the above description, as a brace `for the two twin bars I) b and g g, and the bolt 7c, which passes transversely through holes in bars b b, and through one of the holes in head c, secures the four joints b, d, z', and h rigidly. This bar c is also an adjustable brace, for by removing bolt 76 the bars b ZJ and g g can be set at any desired angie with reference to the beam A or line of draft, and by introducing the bolt 7c again the parts will be held rigidly in the desired position. To this adj ustable iron frame a curved colter C is secured in the following manner: Colter G is represented in Figs. l and 2 of the drawings. lt consists of a curved blade with a screw-pin, Z, projecting from its back edge and near its upper end, which pin receives a nut, Z, when the colter is in its place. A head, m, is formed on the upper end of this colter C, which fits snugly under the teeth of racks j j, and prevents the colter from slipping upwardwhen attached to bars g f/. rlhe lower end of 'the colter C is brought to a point, n, and the bottom or sole is straight, having a short wedge piece, p, secured to it, and projecting out from its bed some distance, as shown in Figs. 1 and 2. sharp knifeedge, which cuts its way through the subsoil. This colter is secured between the two front bars g g by screwing the nut l on pin Z and drawing the head m under one of the rack-teeth on each bar g g. The nut Z binds the colter C between the bars g g, and the head on prevents the colter from slipping endwise.

The shovel or plow blade D may be made of any shape suitably adapted to the purpose. In the drawings it isa fiat elliptical plate, with an elongatedportion projecting from its The front edge of the colter has a applied in its place.

heel7 through which passes a bolt, o', which receives a nut and secures the heel of this plate to the rear end of the wedge-piece p. |The plate D has a hole cut through its center inclining forward, and into this hole the point or tenon projection n of colter C ts. rllhis tenon projection is first introduced into its recess in plate D, and afterward the bolt fr is used to secure the plate firmly to the colter C. This method of securing the platel D to the colter C allows the plate to be readily taken off and another of a different shape or size By loosening nut Z the colter G may be adj usted up or down the bars g g, and again secured by screwing the nut Z hard against the back edges of the bars g g.

It will now be seen that the manipulation of my improved plow is very simple to ellect the adjustment of the shovel D for stirring the subsoil to any desirable depth.

Having thus described my inventiomwhat I claim as new7 and desire to secure by Letters Patent, is-

1. The adjustable brace c, pivoted at eZ and Q3 to the double-pivoted bars b b and g g, and secured to the bars b b, substantially as and for the purposes herein described.

2. rlhe curved colter G, with its head m, screw-pin Z, and nut Z, in combination with the rack-bars g g, as and for the purposes herein described.

JAMES MCCOLLUM. "Witnesses- H. S. PlirsLnY, WM. TURNER. 

